Science : Ch 11 – The Human Eye and the Colourful World

At noon, the Sun looks white as:

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light:

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

The red colour of the sun at the time of sunrise and sunset is because:

Arjun remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed ,Name two observations which can be explained by the above phenomenon.

Arpit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed ,What is the total time diference on duration of day on earth?

Effect produced by scattering of light by the atmosphere.

The sky appears black to an astronaut

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

Myopia can be corrected by using

Astigmatism can be corrected

Rainbow is caused due to

The colour of scattered light depends on the

Visible spectrum is the band of coloured components of a